Belt



Jan. 5, 1943. f F, BQ'EYE 2,307,192

BELT

Filed May 22, 1942 Patented Jan. 5, 1943 UNITED STATES PATENT OFFICE'Ihis invention relates to v-belts, and more particularly to continuousbeltscomprising a series of coils or convolutions having a trapezoidalcross section.

V-belts are most generally used on moderately light work such, forexample, as driving light machines or driving devices such as the fan orthe generator of an automobile. Heretofore, most of the so-calledV-belts have been made from leather or rubber and the like. However,such belts have several undesirable features such as, for example, arelatively small tensile strength per unit of cross sectional area sothat for heavier loads a relatively large belt is required; and

a relatively great density so that belts made from these materials arerelatively heavy. It is an object of my invention to provide a beltwhich can be constructed in a practical manner from materials, such assteel, `which have relatively high tensile strength per unit of crosssectional area so that belts mayl be provided which have a strengthequal to or greater than the strength of the belts now in use and whichare lighter in weight and of relatively small cross section.

It is also a known fact that rubber and leather belts and the like, dryout and deteriorate when subjected to higher temperatures such, forexample, as when used alongside the cylinder walls of internalcombustion engines, and it is another object of my invention to providea belt which is f not aifected by ordinary operating temperatures. Afurther object of my invention is to provide a belt which can safely beoperated at relatively high velocities, and because of the lightness oi'my belt and its relatively great tensile strength per unit of area,invention.

Where V-shaped notches are used in sheaves this object is realized withmy or pulleys, belts oi' other shapes may, of course,

be used. However, whenv other shapes are used good broad control betweenthe belt and the pulley is not provided and results in a loss ofeiliciency in the pulley system. It is an object of my invenpon toprovide a V-belt which may be constructed of continuous convolutions orturns of steel or the like and in which each of the convolutions orturns are oi' substantially a trapezoidal shape to correspondsubstantially to the shape of the groove of the pulley so that broadcontact is provided between the pulley and the belt. l

In addition, when belts are used which have a diiferent shape than thatof the groove in which they are used, such, for example, as when ropessqueezed or crushed and then released as they pass over the pulley andpass beyond it, respectively. 'I'his continual crushing and releasing ofbelts having, for example, a circular cross section, results in anundesirable lateral flexing of' the material from which the belt isconstructed, which continual flexing, after a period of time, tends tocause a weakening in the belt and subjects it to premature breakage. lTherefore, it is another object of my invention to provide a belt havingshape and construction which effectively resists the squeezing andcrushing action of the V-pulley on which it is to be used and thereforeundesired lateral flexing of the material from which the belt isconstructed is held to a minimum.

Another object of my invention is to provide a belt the shape of whichcorresponds relatively closely to the shape of the V-notch with which itis used and which is so constructed that the upper and lower portionsresist the crushing action inherent to use with the V-pulleys.

Other and further objects of the present invention will be apparent fromthe following description and the claim, and are illustrated in theaccompanying drawing which, by way of illustration, shows the preferredembodiment of the present invention and principles thereof and what Inow consider to be the best modes in which I have contemplated applyingthose principles. Other embodiments of theinvention embodying the sameor equivalent principles may be used by those skilled in the art withoutdeparting from the present invention and the purview of the appendedclaim.

In the drawing,

Fig. 1 is an elevational view showing my device mounted on twoV-pulleys;

Fig. 2 is a sectional view taken substantially on the line 2 2 oi' Fig.l;

Fig. 3 is a detail view of a device constructed in accordance with myinvention; and

Fig. 4 is a sectional view taken substantially on the line 4 4 of Fig.3.

In the accompanying drawing a belt Il is shown mounted on ll-pulleys Ilandv I2 (Fig. 1).

V,pulleys, such as those shown in the accompanying drawings have groovesIt which, though commonly termed V-shaped reality of a substantiallytrapezoidal cross secor cables having a circular cross section, are usedtion, having a bottom wall i4 and two side walls II and I6.

The belt l0 is constructed of a strand of material (preferably iron orsteel) which is woundgrooves, are in 2 asoman ,y

into a series of convolutions lII which have a 22 may be of leather,canvas or composition matrapezoidal shape corresponding substantially to.'terial and the, like and should be cemented and the shape of thegroove Il in the pulleys. The "rivetedflrmlx-lntothe grooves I3. Theseinserts convolutions I1 of the belt I0 have side walls II have theadded. advantage that they may be and Il. top wall 20, and a bottom wall2|. And, -5 chosen with an eye to providing the desired e as bestshownin Fig. 2, when the belt Il is prop -eflicient of friction with theparticular belt maerly positioned within the grooves of a V-pulleyterial used and, therefore. give standard pulleys such as pulley II, theside members I8 and I9 Y greater adaptability.

of the belt III engage the side walls- Il and I6 It will benoted thatwhen my novel belt is of the groove I3 and hold the bottom member 10used in aproper manner such as that set forth 2l up and out of contactwith the lower wall Il heretofore, that it provides a strong andpractical of the groove Il. When so positioned in the belting for powertransmission which will give groove I3, the tension on the beltIlrcauses it long and efficient service.

to seat firmly therein so that the good driving Furthermore, it will benoted thatthe present contact between the members I8 and I9 of the 1'5invention accomplishes its intended objects, some belt I and the sidewalls I5 and It of the groove of which have been specincally referred tohere- Il (is maintained. Also, when properly posiinabove and others ofwhich will be apparent tioned in the groove I3 in this manner, the sidefrom the foregoing description taken in conwalls I5 and I6 of the grooveI3 press-inwardly junction with the accompanying drawing.

on the side members I8 and I9 of the belt I0 20 While I have illustratedand described selected and, because the angle between these twomemembodiments of my invention, it is to be underbers is not great, thepressure is applied substanstood that these are capable of variation andtially parallel to the top and bottom walls modification and I.therefore. do not wish to be and 2|, respectively, and so is takenupthereby limited `to the precise details set forth 'but dewith aminimum of bending or flexing. sire to avail myself of such changes andaltera- After a- V-belt and V-pulley have been used tions as fall withinthe purview of the following for a substantial length of time, eitherbecause claim.

of wear on the belt or the groove (or both), the I claim:

belt 'settles further into the groove until at last A continuousone-piece belt adapted to drivthe bottom portion thereof contacts thebottom 3,0. ingly connect a pair of v-shaped grooved pulleys, portion ofthe groove. It will be noted that when and comprising a length of wireformed into a this occurs the belt is prevented from wedging series ofconvolutions each having a substantially tightly into the groove so thatthe pressure be trapezoidal cross section, each of said convolutween thesides of the groove and the sides of tions being defined bysubstantially straight inthe belt is diminished and renders the `beltmore ner, outer and `side portions, said inner and outer susceptible toslippage. For this reason, and portions lying in substantially parallelplanes especially when using a metal belt such as my and said outerportion being substantially longer novel belt I0 which will Vwear thegroove to a than said inner portion.

greater extent, it is advisable to insert such as in- FRED BOEYE. serts22 in the pulley grooves I3. These inserts 40

